QLineEdit check Input

[raphaelf]

Hi everybody,
How could i check if the value from a lineedit contains just ASCII alphanumeric characters like A-Z, a-z, 0-9??
setValidator should be the solution??But i havent found a example..
Where could i found a complete example?
thanks

[jpn]

QRegExpValidator (read carefully the detailed description part, there's an example...)